The Pentagon is blocking more than 150 wind projects over drone fears
via grist.org
Short excerpt below. Read at the original source.
Wind turbines can confuse radar systems on ships and aircraft. Their massive rotating blades create a “blade flash” on radar screens, while their steel bases reflect electromagnetic waves, making it difficult to distinguish the turbines from aircraft or other objects. That’s a problem for the military, which relies on radar for threat detection and navigation. […]